CHICAGO — In Game 5, Carl Soderberg made his NHL postseason debut as the No. 4 left wing. By game’s end, Soderberg had received an unexpected promotion to second-line center.
Neither development was a good sign for the Bruins.
Soderberg, 27, initially got the nod because of Kaspars Daugavins’s diminishing role on the fourth line alongside Rich Peverley and Shawn Thornton.
But when Patrice Bergeron exited the game — and the United Center by ambulance —Claude Julien tabbed Soderberg to assume the No. 2 pivot’s shifts between Brad Marchand and Jaromir Jagr.
That Soderberg relieved Daugavins underscored the fourth line’s transformation.
When Gregory Campbell centered Daniel Paille and Thornton, it was a snarling, bump-first unit that created scoring chances off its heavy play. Full story for BostonGlobe.com subscribers.